Dyfyniad APA

Cope, E. A., & Curtis, C. R. (1957). Filing systems (4th ed.). Ssir issac pitman &sons limited.

Dyfyniad Arddull Chicago

Cope, Edward A., and C. Ralph Curtis. Filing Systems. 4th ed. London: Ssir issac pitman &sons limited, 1957.

Dyfyniad MLA

Cope, Edward A., and C. Ralph Curtis. Filing Systems. 4th ed. Ssir issac pitman &sons limited, 1957.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.